It’s not often a developer blames the council for insisting seven more flats are squeezed into a plot where 18 were planned.

But Westminster Council is not often shown drawings containing several apartments 10 times the size of an average house. This was the case in 2011, when David Marks of Brockton Capital had American architect Robert Stern design an art deco block in Curzon Street over the former home of the Mirabelle restaurant.

Brockton has switched architects to London-based PLP. Plans for what Marks describes as “old money, old-school” apartments were submitted for approval last week. “The changes have been made in response to comments from Westminster,” says Marks. “They wanted to see more units.”

There is still one 9000-square-foot triplex for anyone with £50 million of old or new money to spend. But extra 800-square-foot one-bed flats are included. How much? “Prices are beginning to re-set with the best parts of Knightsbridge,” says Marks. This hints at between £6000 and £7000 per square foot. So the £5 million one-bedder is due to arrive just off Piccadilly in couple of years’ time.